What does the metaphor in these lines from the passage signify?

when yellow leaves, or none, or few, do hang
upon those boughs which shake against the cold,
bare ruin’d choirs, where late the sweet birds sang.

In the poem, anne bradstreet discusses the themes of death and solace, or relief from pain. analyze the development of these themes in the poem. how and why does the speaker relate these two concepts? cite evidence from the poem to support your answer